DayStar Gemini Quark Solar Filter Eyepiece

DayStar Gemini Quark Solar Filter Eyepiece

This DayStar Solar Filter Eyepiece is made to work with refracting telescopes, particularly those with focal ratios of f/4 to f/8.

The Gemini Quark combines the functions of the narrow Chromosphere Quark and the wide Prominences Quark into one! With both of these in the same housing unit, there is no need for equipment swapping or refocusing.

To use the Gemini, all you have to do is push the slider arm to either side. Moving to one side will show the broad-stroked prominences that have a wider bandpass, and the other side will show the higher contrasts that come with the narrow bandpass.

Important note regarding use with Energy Rejection Filters (ERF) from Daystar

• For use with refractors with Oil Spaced Objective Lenses, a front mounted ERF is MANDATORY regardless of aperture to preserve the performance of the telescope.
• For use with refractors with Air Spaced Objective Lenses:
• Up to 80mm in aperture, no ERF is required, either in front of the diagonal or over the front of the telescope.
• With 80mm to 150mm in aperture, a UV/IR blocking filter placed in front of the diagonal will be sufficient.
• With 150mm in aperture and higher, a front mounted ERF as well as a UV/IR in front of the diagonal is required.
Gemini Specifications
• Elements: 2 Fabry Perot Etalon elements
• Etalons: Pair of Narrower (<0.5Å FWHM) and Wider (>0.6Å FWHM), Independently Tuneable
• Eyepiece Compatibility: Male combo 1.25" or 2.0" Combo Eyepiece Snouts and Standard 1.25" Female Eyepiece Drawtube Output
• USB Compatibility: USB power, 5v 2.0amp
• Wing Shifting: Two tuning knobs allow wing shifting +/- 0.5Å with detents at every 0.1Å
• Barlow: Integrated, fully baffled 2 element telecentric 4.2X, optimized for 656nm
• Filter: Integrated 12mm blocking filter, 22mm clear filter aperture
• Refracting Telescope Compatibility: f/4 - f/8 refractors with full disk viewing possible on refractors up to about 450mm in focal length, though it has no aperture limitations and can be used on larger refractors for higher magnification views.